Spiral conveyer



Patented June 6, 1893.

WITNESSES.

UNITED STATES PATENT OFFICE- BENJAMIN F. RADFORD, OF HYDE PARK, MASSACHUSETTS.

SPIRAL CONVEYERp SPECIFICATION forming part of Letters Patent No. 499,175, dated June 6, 1893. Application filed September 15. 1892 Serial No. 446,016. (No model.)

The spiral-conveyer B is made of aband or I To all whom it may concern.-

Be it known that I, BENJAMIN F. RADFORD, a citizen of the United States of America, and a resident of the town of Hyde Park, in the county of Norfolk and State of Massachusetts, have invented a certain new and useful Improved Spiral Conveyer, of which the following is a full, clear, and exact description.

This invention relates to a spiral-conveyer and more particularly such as used in sugarmanufacture to convey, by its operation, sugar along a trough, a cylinder, or such like, and to that class of such conveyors as have consisted of a conveyer-blade spirally surrounding and held on but away from a rotating shaft suitably supported and it and its said blade suitably arranged for the blade in motion to move and to travel out of contact with but near to the inner wall of the trough, cylinder, or such like. In the use of these conveyors a practical increase in the forward forcing capacity of their blades would be desirable, provided'it could be obtained without otherwise sacrificing its well known advantage, to wit, of always allowing and securing the freeing of the sugar from between the outer edge of the blade and the inner wall of the trough, cylinder, or such like, as the sugar is moved forward by them.

The object of this invention is to secure the result above stated, and to that end, it, in substance, consists of a conveyer, of the class stated, having a spiral propelling blade, made of a band or strip of suitable material, and with face, for forcing the sugar forward,that practically is wide and from edge to edge is flat, or substantially so, and with an outer edge, to wit, the edge toward the Wall of the trough, cylinder, or such like, in which the conveyer runs, that is inclined backward from, or in other words, at an acute angle to the working or forcing face of the blade.

In the drawing, forming part of this specification,the figure is a plan view of a portion of the length of the spiral-conveyer of this invention and a horizontal longitudinal section of a portion of a cylinder, in which it moves.

In the drawing, A is the cylinder, B is the spiral-conveyer and O is the shaft for the conveyer B, and to this shaft the conveyer is attached by radial arms D, all and otherwise as usual, except as to this invention.

strip of rigid metal or other suitable material and it has its outer edge (1. toward the innerwall of the cylinder, its opposite and inner edge 1) toward the shaft, and its opposite side faces 0, (1, presented, the one 0 toward one end and the other, (1 toward the other end of the cylinder A or trough, &c., in which the conveyer works. In the rotation of the conveyer, its side-face o is its working or forcing face and its outer edge a is its edge running near but out of contact with the cylinder A or trough, &c. The forcing face 0 of the conveyer, from edge a to edge b, is practically wide and fiat, or substantially so, and the outer edge a 1nclines backward and at an acute angle to said forcing face thereby leaving an angular open space a between said edge of the conveyer and the Wall of the cylinder or trough, &c., directly opposite and contiguous thereto. The wide and flat or substantially flatforcin g face of the conveyor secures a movlng forward by the conveyer of the sugar along the cylinder or trough, &c., to the highest degree and the backward inclining outer edge a of the conveyer affords and secures an absolute and certain avoidance and relief of all possible packing of sugar between said edge and the contiguous wall of the cylindenor trough, &c., the advantages of all of which are obvious without further explanation.

Having thus described my invention, what I claim, and desire to secure by Letters Pat cut, is-

In combination with a cylinder, trough, &c., a conveyer for sugar, &c., composed of a-strlp or band having a Wide and flat or substantially flat face 0 for forcing, by the rotation of the conveyer, the sugar along the cylinder and an outer edge a that inclines backward from and is at an acute angle to its said forcing face, substantially as described, for the purposes specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

BENJ. F. RADFORD.

Witnesses:

E. E. CHANDLER, G. H. 00X. 

